Trolley mechanism



J. T. FULLER. TROLLEY MECHANISM.

(No Model.)

No. 509,123. Patented Nov. 21, 1893.

' fi/JATTORNEM INVENTOR WITNESSES:

UNITED STAT S PATENT OFFieE.

JAMES T. FULLER, OF CALVERT, TEXAS.

TROLLEY MECHANISM.

SPECIFICATION forming part of Letters Patent No. 509,123, dated November 21, 1893.

Application filed July 17,1893.

To all whom it may concern:

Be it known that I, JAMES T. FULLER, a citiz en of the United States, residing at Oalvert, 1n the county of Robertson and State of Texas, have invented certain new and useful Improvements in Trolley Mechanism, of which the following is a specification, reference beng had therein to the accompanying drawlugs.

My invention relates to certain new and useful improvements in trolley mechanism.

The-object of my improvements is to provide a pivot yoke adapted to normally follow in line with the trolley pole, but allowing of being swerved out of line when the car is going around a curve of the trolley wire; to prevent catching on cross-wires in case the trolley wheel should leave the line-Wire; and to adjust the amount of pivotal action of said yoke with regard to the trolleypole.

To this end, my improvements have reference to a yoke provided with downwardly and outwardly extending lugs adapted to limit the pivotal action of the head; have reference to a journal for said yoke and carried by the trolley pole inclined more or less to the rear; have reference to various, details of adjustment, arrangement and combination of parts hereinafter fully pointed out and claimed.

In the accompanying drawings on which like reference letters indicate corresponding parts, Figure 1 represents a side view of my trolley mechanism and a portion of the pole on which it is mounted; Fig. 2, a plan view of the same; Fig. 3, a view looking at Fig. 1 from the right; Fig. 4, a partial view of the same figure from the left; Fig. 5, a detail drawing of the yoke pivot; Fig. 6, a crosssection of Fig. 1 on the line a:a:; and Fig. 7, a detail of the special form of trolley-wheel spring. I

Letter A designates a trolley pole provided with a socket in which is riveted or otherwise secured a pivot piece B having a stud O on which is mounted a yoke D provided with the usual trolley-wheel E mounted between the ears thereof. This piece B has said pivot stud O at such an angle that the axis yy is more or less inclined to the rear when mounted on the trolley-pole, as shown in Fig. 1. The trolley-wheel therefore swings in a plane 2 a, Fig. 1 at right angles to the axis 1 y, and dipping to the rear.

(No model- The lowest position of the trolley-wheel is thus when it is directly in the rear of the trolley-pole and in substantially the same vertical plane. When going around a curve the trolley-wheel swings about the axis y y in the plane .2 z and tends to rise more or less from its lowest position, as above described. The normal tendency of the wheel, therefore, is to follow directly in line with the trolley-p0le, but by means of its pivotal mounting on the stud C, it can swing to one side or the other, as indicated in Fig. 2. In order to increase this tendency of the yoke and wheel to maintain themselves in the same plane with thetrolley-pole, I provide a proj ection b on the piece B, which engages loosely with a corresponding notch or double incline d, Fig. 4, on the yoke. The yoke thus rides on the projection 21 when turned to one side or the other, and is axially raised more or less on the stud 0, thereby further assisting the tendency of the yoke and wheel to maintain themselves in line with the trolley-pole.

The stud C does not extend to the top of the yoke, but leaves an opening which serves as an oil cup which may be plugged with paste or saturated with oil and graphite to'secure lubrication and prevent the entrance of Water. The accidental separation of theyoke and stud is prevented by a pin G passed through the yoke and a notch or recess a in the stud, as shown in Figs. 5 and 6. The recess 0 extends circumferentially to allow the pivotal action of the yoke, and Vertically to allow the up and down motion before referred to. From the yoke extend forward and downward, outwardly projecting wings or lugs F, which are adapted to engage with the trolleypole to limit the pivotal action of the yoke upon the stud 0.

Referring to Fig. 3, it will be seen that these wings are gently curved downward toward the trolley-pole and present guiding edges on which may ride the cross-wires in case the wheel should by any means be disengaged from the trolley wire. The cross-Wire will not, therefore, be torn down as there are no proj ections from the yoke or pole on which it can catch.

The dotted position of the wheel and yoke in Fig. 2 with regard to the pole, shows that the pivotal motion is limited by one of the wings F coming in contact with the pole, as indicated by dotted lines. The amount of this sidewise motion may be varied by bending the wings more or less as indicated in the same figure. This adjustability of the wings is a point of practical value.

In order to secure side contact of the trolleywheel with one ear of the yoke, a spring H is ordinarily provided which I make of the peculiar form shown in Fig. 7. One end of the spring is perforated or otherwise to embrace the wheel-spindle and the other end has two slots h. A screw I fits each slot and clamps the spring against the yoke, as shown in the figures. This slotted spring assists assembling the parts, as the spring may be adjusted with regard to the trolley-wheel spindle, and then the clamping screws I may be set up to hold the spring in place.

I further provide a cross piece preferably in the form of a bolt J connecting the lower ends of the wings F, and passing under the trolley-pole, as shown in the figures. This stay prevents the wings spreading out under unusual strain upon the trolley; it also may be used to bring the wings closer together, as before suggested, and assists in preserving the yoke in its mounted position upon the stud C. Sufficient clearance between the pole and the rod is provided when necessary to allow of the axial motion of the yoke, as before described.

I do not limit myself to the particular style and arrangement of parts hereinbefore described, but show them to fully illustrate my invention in its preferred form.

Having thus fully described my invention, what- I claim as new, and desire to secure by Letters-Patent, is

1. In a trolley, a pivot yoke provided with wings adapted to limit the pivotal action of said yoke.

2. In a trolley, the combination with atrolley-pole, of a yoke pivotally mounted thereon and provided with wings adapted to engage with said pole and limit the-pivotal motion of said yoke.

3. In a trolley, the combination with a trolley-pole having a rearwardly inclined stud, of a yoke pivotally mounted thereon and adapted to carry a trolley-wheel, and provided with wings inclined forward and .downward to engage with said pole and limit the pivotal action of said yoke.

4. In a trolley, the combination with a trolley-pole, of a pivot piece mounted thereon and having an upward extending stud, and a wheel-carrying yoke mounted on said stud, a projection on one member and a corresponding notch on the other member, whereby the yoke tends to maintainapositionin linewith the pole.

5. In a trolley, the combination with a trolley-pole stud, of a wheel-carrying yoke pivotally mounted thereon, the stud having a socket in the yoke adapted to receivea lubricating plug.

6. In a trolley, the combination with a wheel-carrying yoke having outwardly extending wings, and a trolley-pole on which said yoke is pivotally mounted, of a cross piece connecting the outer ends of said wings and passing under said pole.

7. In a trolley, the combination with a wheel-carrying yoke having lateral and downwardly extendingwings, and a trolley-pole provided with a stud on which said yoke is pivotally mounted, of a cross bolt connecting the lower and outer ends of said wings and adapted to engage with said trolley-pole and prevent the disengagement of the yoke and stud.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES T. FULLER. Witnesses:

P. J. SoUoY, FRANK WYMAN. 

